Hach-Lange SI792 ET User Manual

Quick start guide

si792 E/T 2-wire conductivity transmitter DOC016.53.00796

DANGER Explosion hazard. This Quick Start Guide is intended for setup of the si792 transmitter in a non-hazardous location. It is not a substitute for the instructions in the user manual (DOC026.53.00796). Installation in a hazardous location must follow the applicable control drawing or ATEX certificate (refer to the documentation CD).

DANGER: Electric shock hazard. Disconnect power to all wiring before making connection to the si792 E/T series transmitters.

Connect 24 VDC power and communications

Remove the power source before making any electrical connections to the si792 transmitter.

si792 transmitter version

Terminal No.

Connect the sensor—Hach GLI 3700 series inductive conductivity sensors

Jumper Terminal No. 3700 series color 7MA2200 series color

— 1 white green

Jumper between terminals 2

and 3

— 4 green brown

— 5 shield violet/black

—7—black/grey

—8redred/pink

For sensors other than Hach 3700 series, refer to the user manual.

Basic configuration—4–20 mA

1. Press CONF and enter 1200 to enter the configuration mode. The following menus can

be changed:

• 4–20 mA current output—out.1MNU

• Temperature compensation—tc MNU

• Alarms—ALrt MNU

2. To move to a different menu, press the

3. To change a setting within a menu, use the

to change the setting.

4. Press

ENTER to move to the next item in the menu.

To exit the configuration mode at any time, press manual for additional configuration options.

4–20 mA/HART Profibus PA Foundation Fieldbus

(–) (–) (–)

(+) (+) (+)

2blue yellow

3 yellow white

RIGHT ARROW ">", then press enter.

UP ARROW "^" or RIGHT ARROW ">" buttons

CONF and then ENTER. Refer to the user

4–20 mA signal values

Default settings:

• 0 mS at 4 mA

• 100 mS at 20 mA

1. Press

2. Press

CONF, enter 1200 for the “out. 1MNU” menu. ENTER to go to the "o1.4mA" or "o1.20mA" sub-menu.

3. Set the values for 4 mA and 20 mA.

4. Press

CONF, then ENTER to exit the configuration mode.

Calibration

Zero calibration in air

1. Press

CAL, enter passcode: 1001, ENTER. CAL ZRO will be displayed for 3 seconds.

2. Remove and clean the sensor.

Note: Make sure that the sensor is dry.

3. Use the UP ARROW and RIGHT ARROW to change the value until zero is displayed as the conductivity value.

Note: If the entry of the zero point value takes longer than 6 seconds, the display will alternate between showing the conductivity value and the temperature value.

4. Press ENTER to confirm.

5. The display will show the new cell constant value and zero point. Press ENTER.

6. Immerse the sensor in the process water.

7. The transmitter remains in the HoLD mode. Press

ENTER again.

The transmitter remains in HoLD mode for approximately 20 seconds after calibration and returns to the measurement mode.

Note: Repeat the calibration when “Err” is displayed.

Calibration with a calibration solution

Use a calibration solution with a known conductivity value to adjust the transmitter to show the same value as the solution.

Note: Stabilize the temperature during calibration.

1. Press CAL, enter passcode: 0110, ENTER. CAL SOL will be displayed for 3 seconds. The transmitter is ready for calibration.

2. Remove and clean the sensor.

3. Immerse the sensor in the calibration solution.

4. Use the

Note: If the entry of the calibration solution value takes longer than 6 seconds, the display will alternate between showing the cell constant and the temperature value.

UP ARROW and RIGHT ARROW to enter the known value of the calibration solution.

5. Press ENTER to save the value.

6. The display will show the new cell constant. Press

7. The transmitter remains in HoLD mode. Press

ENTER.

ENTER again.

The transmitter remains in HoLD mode for approximately 20 seconds after calibration and returns to the measurement mode.

The display will show the temperature-corrected value of the calibration solution (unless temperature compensation is set to off in the configuration menu).

Note: Repeat the calibration when “Err” is displayed.

Calibration by comparison/grab sample

The sensor can be calibrated by measuring the process water with a portable instrument or taking a grab sample and measuring the value in the lab (one-point calibration). The sensor does not need to be removed from the process during calibration. The sample temperature should correspond to the measured process temperature for accurate results.

Note: The calibration by comparison option is not available when the range and units are set to 000.0%.

1. Press CAL, enter passcode: 1105, ENTER. The display will show CAL PRD and then StorE.

2. Measure the process water with a portable instrument or collect a grab sample for mea-

surement in the lab. Press

ENTER to proceed.

The cal mode indicator will flash to indicate that calibration has not been completed. The transmitter will continue to measure and display the current sample values.

3. Measure the grab sample with a laboratory or portable meter.

4. Press

CAL, enter passcode: 1105, ENTER to access the product calibration once more.

The display will briefly show CAL PRD and then CALC.

5. Edit the displayed value to match the value measured by the laboratory or portable meter and press

6. Press

ENTER. The display will show the new cell constant.

ENTER to end the calibration. The display will alternate between the measured value

and Hold.

Press

ENTER to return to the measuring mode. The outputs will remain in the hold mode for

approximately 20 seconds.

Note: For comparison calibration via Foundation Fieldbus, see the User Manual.

Table 1 Default passcode settings

Display Function Default setting

Cal INFO Calibration information 0000

CAL 0-CAL Calibration zero 1001

CAL CELL Calibration—cell factor adjustment 1100

CAL SOL Calibration with standard solution 0110

CAL PROD Product calibration 1105

CAL RTD Temperature sensor adjustment 1015

CFG ERR Error information 0000

CFG CONF Configuration mode 1200

CFG SNSR MO Sensor monitor 2222

CFG OUT Current source 5555

CFG SPCL ST

Administrator passcode. Use select NO or YES

Do not change

NO SPCL ST

administrator passcode

YES SPCL ST

Not available with si792x E/T-PA

Change administrator passcode

ARROW keys to

Press

ENTER to return to the default

CONF to exit the editor

Press

ENTER to accept the new passcode

Press

CONF to exit the editor

Press

1989