Command/Property

Description

DegasStatus

Reports the eluent degasser status, either enabled (On) or disabled (Off). When enabled, the degasser vacuum pump turns on and off as needed to maintain a vacuum.

EluentBottleLevel

Indicates the volume of liquid (in liters) in the eluent reservoir. To ensure the accuracy of this value, enter the volume of liquid in the reservoir each time you fill the reservoir.

EluentValve

Sets the eluent valve position (Open or Closed).

FastPressurization

Starts the fast ramping of pressure to the system operating pressure (see PumpPressureRampMode).

LeakAbort

Specifies whether to abort the operation when a leak is occurring.

On, Off, Prime

Turns the pump on or off, or starts the pump priming function.

PumpMode

Indicates whether the pump is on, off, or priming.

PumpPressureRampMode

Sets the mode used for fast ramping:

NoRamp: The pressure does not ramp-up quickly. The pressure increases at a slower rate, determined by the set flow rate.

RampToTargetPressure: The pressure ramps up quickly to the target pressure (see PumpTargetPressure).

RampUsingStepPressure: The pressure increases quickly to 3 MPa (500 psi) and then by a series of smaller step increases, each consisting of a small fast ramp up followed by a short period of regular operation.

PumpPrimeFlowRate

Sets the pump flow rate during priming.

PumpRampStatus

Indicates whether the pump is currently performing the fast ramping function.

PumpTargetPressure

Sets the target pressure when PumpPressureRampMode is RampToTargetPressure. Fast ramping stops when the target pressure is reached.

Command/Property

Description

AcqOn/Off

Start/stop data acquisition.

Average

Averages all measured values.

ON: Averages all measured values over the step interval (recommended).
OFF: Records only the last sample of each interval.

Delta

Reports the signal's slope (the difference between the value and the value 1 second ago). Reported in signal unit/second.

MaxAutoStep

Sets the maximum step rate when Step is set to Auto.

Retention

Reports the signal's retention time.

Signal

Reports the current signal value during data acquisition.

Step

Sets the step for data acquisition.

Commands/Properties

Description

Autozero

Resets all signals delivered by the detector to zero.

CellControl

Sets the cell control source.

Normal—the cell sends a signal to the detector normally.

Cell_Electrically_Disconnected—the cell is disconnected from the detector electronics; no signal is sent to the detector.

x_mS_Dummy—a signal that simulates a 1, 21, 180, or 3000 mS conductivity response is sent to the detector.   

Conductivity

Reports the measured conductivity minus the conductivity of the background. The background offset is determined by the last Autozero command.

Data_Collection_Rate

Sets the rate at which Chromeleon collects digital data points from the detector.

DataPolarity

Sets the signal polarity to Normal or Inverted.

Rise_Time

Sets how quickly the detector responds to a change in signal.

TempCompensation

Sets the temperature compensation factor, which is used to stabilize conductivity readings.

TotalConductivity

Reports the measured conductivity with no offset applied (the total conductivity including the background conductivity).

Commands/Properties

Description

Autozero

Resets all signals delivered by the detector to zero.

CellControl

Sets the cell control state.

On—the cell is on and sends a signal to the detector normally.

Off—the cell is off.

If a PdH electrode is selected, turning the cell on turns on the PdH electrode power.

CellStatus

Reports whether the cell is connected to or disconnected from Chromeleon.

Data_Collection_Rate

Sets the rate at which Chromeleon collects digital data points from the detector.

DC_Voltage

Sets the fixed potential applied to the working electrode, in the range of -2.048V to +2.047V. Setting the voltage automatically turns on the cell.

Electrode

Selects the reference electrode type (AgCl, pH, or PdH).

ElectrodeStatus

Reports whether the electrode is connected or disconnected.

IntegratedDataReading

Reports the data reading at integration.

Mode

Sets the operating mode: IntAmp (integrated amperometry) or  DCAmp (DC amperometry)

PdHElectrodePower

Turns the PdH electrode power on or off. Turning the PdH electrode power on, automatically turns on the cell, and turning the PdH power off, turns off the cell.

pH.LowerLimit

Sets the lower limit for pH. An error is reported in the Audit Trail if the pH is lower than this value at the start of acquisition.

pH.UpperLimit

Sets the upper limit for pH. An error is reported in the Audit Trail if the pH is higher than this value at the start of acquisition.

pH.Value

Reports the current pH value.

Rise_Time

Sets how quickly the detector responds to a change in signal.

SignalValue

Reports the measured signal minus the background signal. The background offset is determined by the last Autozero command.

TotalSignalValue

Reports the measured signal with no offset applied (the total signal including the background).

Waveform

Define a waveform (a plot of potential vs. time).

Commands/Properties

Description

Autozero

Resets all signals delivered by the detector to zero.

CellControl

Sets the cell control source.

Cell_On—the cell is on and sends a signal to the detector normally.

Cell_Off—the cell is off. A signal value of 0 is sent to the detector.

x_x_mA_Dummy—a signal that simulates a specific current (mA) is sent to the detector.   

Current

Reports the measured current minus the current of the background. The background offset is determined by the last Autozero command.

Data_Collection_Rate

Sets the rate at which Chromeleon collects digital data points from the detector.

DataPolarity

Sets the signal polarity to Normal or Inverted.

Rise_Time

Sets how quickly the detector responds to a change in signal.

Temperature_Compensation

Sets the temperature compensation factor, which is used to stabilize readings.

TotalCurrent

Reports the measured current with no offset applied (the total current including the background current).

Voltage

Sets the potential applied to the cell and turns on the cell.

Command/Property

Description

AcqOn/Off

Start/stop data acquisition.

Autozero

Automatic autozero.

Delta

Reports the signal's slope (the difference between the value and the value 1 second ago). Reported in signal unit/second.

Retention

Reports the signal's retention time.

Signal

Reports the current signal value during data acquisition.

Command/Property

Description

Mark

Sends a positive pulse to the detector’s analog output as an event marker.

Offset_Level

Sets the offset (0 to 100%) applied to the recorder output.

Polarity

Sets the recorder output polarity.

Recorder_Calibration

Calibrates the recorder output (Normal, Zero, or Full-Scale).

Recorder_Range

Sets the full-scale output range of the recorder.

Command

Description

ControlValue

Reports a number that represents the percentage of the full value of the temperature device.

Mode

Sets the mode (On or Off) of the temperature device.

ReadyTempDelta

If the difference between the actual temperature and the temperature set point exceeds the ReadyTempDelta value, the state of the temperature device will be NotReady (see TemperatureState).

For example, if the temperature is set to 30°C and ReadyTempDelta is set to 1°C, the device enters the Ready state when the actual temperature is between 29° and 31°C. If the actual temperature is outside this range, the device is in the NotReady state.

If the ReadyTempDelta is set to None, Chromeleon does not check whether the set point temperature deviates from the actual temperature. In this case, the TemperatureState is always Ready.

Status

Reports the temperature status in relation to the set point (Under_temperature, At_setpoint, Over_temperature).

TemperatureActual

Reports the current actual temperature of the device.

TemperatureSet

Sets the temperature set point for the device.

TemperatureState

Reports whether the temperature device is Ready or NotReady.

Command

Description

Current

Reports the actual suppressor current.

CurrentSet

Sets the current supplied to the suppressor (in mA).

eluent concentrations

The following properties specify the concentration of eluent. Chromeleon uses the entered concentration to calculate a recommended suppressor current.

Carbonate, Bicarbonate, Hydroxide, Tetraborate, H2SO4, MSA, OtherEluent.

Mode

Turns the suppressor on or off.

RecommendedCurrent

Specifies a recommended suppressor current, based on the entered eluent concentration.

Type

Indicates the type of Suppressor installed.

Voltage

Reports the suppressor voltage.

Command

Description

CR_TC

Turns the CR-TC on or off.

InstCurrent

Reports the CR-TC current (in mA) when the CR-TC is on.

InstVoltage

Reports the CR-TC voltage (in V) when the CR-TC is on.

Mode

Reports the CR-TC mode (RFIC_Capillary, Sample_Preparation, Water_Purification_Capillary). The mode is automatically set, based on the installed EGC type and the pump flowrate.

OperatingMode

Indicates the operating mode (RFIC, Sample_Preparation, Water_Purification). For RFIC, the pump and EG must be on. For water purification, the pump must be on.

Command

Description

HP_Valve_1, HP_Valve_2

The following commands are available:

State indicates or sets the state of the optional high-pressure valve.

A sets the valve to the A position.

B sets the valve to the B position.

Duration toggles the valve's state after the specified time.

InjectValve

The following commands are available:

State indicates or sets the state of the injection valve.

LoadPosition sets the valve to the load position.

InjectPosition sets the valve to the inject position.

Duration toggles the valve's state after the specified time.

LP_Valve_1, LP_Valve_2

The following commands are available:

State indicates or sets the state of the optional low-pressure valve.

Closed closes the valve.

Open opens the valve.

Duration toggles the valve's state after the specified time.

Relay_1, Relay_2

The following commands are available:

State indicates or sets the state of the relay.

Closed closes the relay.

Open opens the relay.

Duration toggles the relay's state after the specified time.

The relay-contact closures are normally open. When the relay is closed, current flows to the connected device (turns on the action).

TTL_1, TTL_2

The following commands are available:

State indicates or sets the state of the TTL.

0v sets the TTL to 0 volts.

5v sets the TTL to 5 volts.

Duration toggles the TTL’s state after the specified time.

The TTL outputs are normally at 5 volts. Setting a TTL output to 0 volts turns on the action in the connected device.

TTL_Input_1, _2, _3, _4

State reports the state of the TTL input (0v or 5v)

Mode reports the selected TTL Input Mode.

Command

Description

Speed

Sets the speed in (%) for the seal wash pump or device connected to the PWM Drive. 100% is full speed and 0% is off.

Mode

Sets the mode:

Off turns off the pump or device.

On turns on the pump or device. It remains on until turned off.

Interval turns the pump or device on and off at fixed intervals (for example, 1 minute on, 30 minutes off). The on/off intervals continue until the pump or device is turned off.

OnDuration

When the Interval mode is selected, OnDuration specifies the length (in minutes) the pump or device is on during each on interval.

OffDuration

When the Interval mode is selected, OffDuration specifies the length (in minutes) the pump or device is off during each off interval.