10 TEGAM WAY • GENEVA, OHIO 44041
440-466-
6100 • FAX 440
-466-
5-1
Section V
–
Maintenance and Servicing
1830A System Calibration and Diagnostics
The calibration of the 1830A is a web based process and requires a LAN connection. Please refer
to Section IV of this manual for instructions on how to make a LAN connection.
The 1830A offers two different options; calibration and verification. One method simply verifies a
calibration and one method follows the same procedures but at the end of the procedures allows
the user to save the calibration data to the 1830A.
•
Diagnostics - Used to check performance verification as well as how much the unit may
have drifted from the last calibration values. Each test can be performed individually.
•
Calibration - Performs a full system calibration on the both analog channels in the unit.
Note: The Diagnostic option is an excellent way to become familiar with the calibration
process without risk of overwriting previous data.
Note: All of the calibration procedures are located internal to every 1830A and are
accessible through the LAN interface webpage. This section will list all of the
calibration procedures and will give an example of the first step. Please note that this
example may be slightly different from what the user may see on the LAN interface
webpage because firmware versions change some of the wording and diagrams.
Calibration and Verification Equipment
Below is a list of the equipment needed to perform an 1830A calibration.
1. Source requirement:
Source shall be capable of delivering a stable (change per
minute less than 1% of total error in lab temperature conditions) voltage of between 0.5V
and 4.5V DC into 100 Ohms.
2. Voltage measure requirement:
Voltage sourced across the resistor can be EITHER
set on an accurate stable calibrator such as FLUKE 5720A or set on a stable source and
read using a voltmeter. In either case, use the same range for every voltage (10 or 11
Volt Range suggested). Use a calibrator or Voltmeter so that total 95% confidence
uncertainty for the following voltage requirements.
•
Volts at 0.5 V within 3.66666E-05 V
•
Volts at 4.5 V within 11.66666E-05 V
3. Resistance requirement:
When a 100-Ohm or 200-Ohm resistor is required, attach a
resistor whose value is within 1% of the required nominal value, and whose value is
known with a 95% confidence uncertainty to within 0.004133334 Ohms for the 100-Ohm
resistor and 0.009333334 Ohms for the 200-Ohm resistor. This can be achieved by using
a stable resistor calibrated to the required accuracy OR using a precision resistor that is
measured to within the required accuracy using a precision Ohmmeter before use. If the
second method is used, long-term drift and temperature coefficient of the resistor may
not need to be included in the uncertainty estimate.
