SM 04L01A01-01E
4-1
4
ADJUSTMENTS
4.1 Before You Begin
Chapter 4 Adjustments
This chapter describes how to adjust the DAQSTATION DX100/DX200.
Adjustment is required when the performance test results in an excessive tolerance
error, or after replacing the AD board assembly. In addition, adjustments are
recommended once a year to maintain high accuracy.
This chapter consists of the following sections.
4.1 Before You Begin
4.2 AD Board Offset and Gain Adjustment
4.1 Before You Begin
Adjustment Conditions
When carrying out the adjustments described below, make sure the recorder’s
environment meets the following conditions.
Ambient temperature:
23
±
5
°
C
Humidity:
35 to 75% RH
Power supply voltage:
rated voltage
±
(rated voltage x 5%)
Preparation
Perform the following steps before carrying out the adjustments.
1
Turn on the power supply and verify that the unit under adjustment passes the self-
diagnostic tests without any problems.
2
Allow a warm-up time of at least 30 minutes for the required instruments and the unit
under adjustment.
Required Instruments
Instrument
Required Specifications
Recommended
DC voltage standard
Accuracy:
±
50ppm of setting
FLUKE
Resolution: 10
µ
V
5520A
Decade resistance box
Accuracy:
±
0.01%
YOKOGAWA
2793
Personal computer
With ETHERNET or RS-232
or RS-422A/485 interface
(depends on your system)