8850-1eng 电导率表说明书(4)

GF 8850电导率表说明书

Calibrate Menu

Display

(Factory settings shown)

Description

Select CUSTOM only if you are connecting a certified conductivity sensor. SelectSTANDARD for all other systems.

Cell Constant:

StandardCell: Standard

1

Cell: Custom

1.0000

Cond Units:

uS

PPM Factor:

2.00Set:Temperature

Set:ConductivityLoop Source:

Cond

Loop Range: uS0.0000 → 100.000Output Source:

Cond

Output Mode:

Low

Output Setpnt:

10.0000 uSOutput Hys:

0.5000 uS

Output Rng: uS10.0000 → 40.0000Output PlsRate:

120 Pulses/Min

Last CAL:06-30-01

page 6 of 12

>

For STANDARD sensors: Select from these options: 0.01, 0.1, 1.0, 10.0 or 20.0.

>

For CUSTOM sensors: Enter the precise cell constant from the certificate provided with yoursensor, or from the information label on the sensor.

>

Select from the following options: µS, mS, k , M , PPM

>

If the Units selection is PPM, you can set the ratio of Total Dissolved Solids to µS. Seesection 3 of this manual for additional information. The TDS factor can only be set in PPM.

>

Adjust the temperature of the system based on an accurate external reference.

>

For use with STANDARD sensors: Perform this single-point wet calibration for most accurateresults. Not required for CUSTOM sensors except for periodic system accuracy confirmation.Enter all zeroes to restore factory calibration to TEMP and COND settings.

Select the input source to be associated with the current loop output: Conductivity orTemperature.

>

>

>

Select the minimum and maximum values for the current loop output.Be sure to modify this setting if you change the Cond. Units.

Select the source for the Open Collector output: Conductivity or Temperature

>

Select the mode of operation for the Open Collector output.Options available are High, Low or proportional Pulse.The signal may be disabled (Off) if not in use.

In Low or High Mode, this Open Collector output will be activated when the process reachesthis value. Be sure to modify this setting if you change the Cond. Units.

>

>

>

The Open Collector output will be deactivated at Setpoint ± Hysteresis, depending on High orLow Setpoint selection. (See details on page 4.)

>

In Pulse mode, set the process values where the proportional pulse will start and where it willreach the maximum rate. Be sure to modify this setting if you change the Cond. Units.

>

In Pulse mode, set the maximum rate for the proportional Pulse output. The 8850 will acceptany value from 0 to 400.

>

Use this “note pad” to record important dates, such as annual recertification or scheduledmaintenance.

SIGNET 8850-1 Conductivity/Resistivity Transmitter