Mettler Toledo Calibration Procedure for 822 & 832 Meters Installation guide

Mettler Toledo
Brand
Mettler Toledo
Model
Calibration Procedure for 822 & 832 Meters
Type
Installation guide

Mettler Toledo Calibration Procedure for 822 & 832 Meters

The Mettler Toledo Calibration Procedure for 822 & 832 Meters is a comprehensive guide to calibrating and verifying the accuracy of your 822 or 832 meters. This procedure will help you ensure that your meters are providing accurate and reliable readings, which is essential for maintaining the quality of your water analysis results.

The calibration procedure is divided into three sections: Mechanical Calibration, Power Supply Board Calibration, and Analog Board Calibration. The Mechanical Calibration section provides instructions on how to adjust the meter's mechanical zero. The Power Supply Board Calibration section provides instructions on how to adjust the meter's power supply voltage. The Analog Board Calibration section provides instructions on how to adjust the meter's analog circuitry.

Mettler Toledo Calibration Procedure for 822 & 832 Meters

The Mettler Toledo Calibration Procedure for 822 & 832 Meters is a comprehensive guide to calibrating and verifying the accuracy of your 822 or 832 meters. This procedure will help you ensure that your meters are providing accurate and reliable readings, which is essential for maintaining the quality of your water analysis results.

The calibration procedure is divided into three sections: Mechanical Calibration, Power Supply Board Calibration, and Analog Board Calibration. The Mechanical Calibration section provides instructions on how to adjust the meter's mechanical zero. The Power Supply Board Calibration section provides instructions on how to adjust the meter's power supply voltage. The Analog Board Calibration section provides instructions on how to adjust the meter's analog circuitry.

Mechanical Calibration (required only on model 822):
1. With the power turned off
, install a jumper on terminal strip TB1 between terminals 0 and 1.
2. Adjust the 822's mechanical zero (needle pointing to zero with power off) by turning the screw located directly
behind the meter movement.
Power Supply Board Calibration:
1. Remove the previously installed jumper (Mechanical Calibration step 1).
2. Place the common lead (-) of a Digital Volt Meter (DVM) on TB1 terminal 1.
3. Place the positive lead (+) of the DVM on pin 1 of IC U1.
4. Turn on the power.
5. Adjust R13 on the power supply board until the DVM reads 10.20 VDC ± 0.01 VDC.
Analog Board Calibration:
1. Connect the calibrator/simulator via the patch cord or fixed resistors to TB1 terminals 1 thru 4.
2. Dial X1 on 822/832's range switch .
3. Place the DVM's common lead (-) on TB1 terminal 1, and the positive lead (+) on TB1 terminal 0.
4. Adjust R1 on analog PCB until DVM reads 5.00 VDC ± 0.05 VDC.
5. Turn the 822/832's range switch to "CHECK" and hold it at this position.
6. Adjust R29 on analog PCB until DVM reads:
For 822: 10.00 VDC ± 0.05 VDC
For 832: 5.00 VDC ± 0.05 VDC
Digital Board Calibration (required only on model 832):
1. While holding the 832's range switch in the "CHECK" position, turn R1 on the digital PCB until the 832's
digital display reads 10.0 ± 0.1.
Calibration & Accuracy Verification Procedures
For 822 & 832 Meters
THORNTON
Leading Pure Water Analytics
www.thorntoninc.com
For the most current product information visit:
email: [email protected]
www.thorntoninc.com
822_cal.doc Rev C.
Updated logo & address 09/03
Mettler-Toledo Thornton, Inc.
36 Middlesex Turnpike
Bedford, MA 01730 USA
Telephone: +1-781-301-8600
Toll-Free: 1-800-510-PURE
Customer/Technical Service
Telephone: +1-781-301-8690
Toll-Free: 1-800-642-4418
Cust Service Fax: +1-781-271-0214
Tech Service Fax: +1-781-271-0675
Mettler-Toledo Thornton, Inc. – Subject to Technical Changes
10 M
ΩΩ
Calibrator/simulator Pinout:
100.0 K
ΩΩ
between pins 1 and 2
10.0 K
ΩΩ
between pins 2 and 3
180.0 K
ΩΩ
between pins 2 and 4
NOTE: It may be necessary to connect a ground wire internally
between earth ground (Pin 9, TB2) and cell ground (Pin 1,
TB1) to avoid ground pickup problems.
2
3
10 K
ΩΩ
100 K
ΩΩ
10 Meg-Ohm
Simulation
180 K
ΩΩ
TB1
4
1
  • Page 1 1

Mettler Toledo Calibration Procedure for 822 & 832 Meters Installation guide

Mettler Toledo
Brand
Mettler Toledo
Model
Calibration Procedure for 822 & 832 Meters
Type
Installation guide

Mettler Toledo Calibration Procedure for 822 & 832 Meters

The Mettler Toledo Calibration Procedure for 822 & 832 Meters is a comprehensive guide to calibrating and verifying the accuracy of your 822 or 832 meters. This procedure will help you ensure that your meters are providing accurate and reliable readings, which is essential for maintaining the quality of your water analysis results.

The calibration procedure is divided into three sections: Mechanical Calibration, Power Supply Board Calibration, and Analog Board Calibration. The Mechanical Calibration section provides instructions on how to adjust the meter's mechanical zero. The Power Supply Board Calibration section provides instructions on how to adjust the meter's power supply voltage. The Analog Board Calibration section provides instructions on how to adjust the meter's analog circuitry.

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