Chemtrac UV254 Monitor
– UVM5000 v 2.1
Chemtrac, Inc.
23
11 RS-232 Data Logging
The UVM5000 has the capability to data log various
performance variables on a local computer via an RS-232
interface. The data log frequency as well as the specific data
to be logged is configurable. Refer to RS-232 Data Log in
the menu structure.
The RS-232 data feed is through a 9-pin serial cable to a
com port on a local computer supplied by the owner. Only 2
wires are used as shown in Figure 11.1. If the computer
does not have a 9-pin serial port, then a USB to serial
adapter can be used.
Note that the communication protocol for RS232 is ASCII. An example of one data stack is shown here based
on the use of optional turbidity compensation:
The order of the data stack in ASCII (from left to right) is: UVT (or UVA) | Lamp 1 | Water 1 | VIS 1 | Lamp 2 |
Water 2 | VIS 2 | Temperature | Humidity | Status. The output value can be UVT, UVA, or correlation mode,
which is selected via the UVA/UVT Mode in the Analyzer menu in Section 9.
Table 5 itemizes each parameter and its corresponding value. Without turbidity compensation, no VIS 1 or 2
values would be listed.
Table 5: Data logging - ASCII string description for Analyzer
PARAMETER
VALUE
UVT
91.2
LAMP 1
2765
WATER 1
2505
VIS 1 (Optional)
2600
LAMP 2
2837
WATER 2
2564
VIS 2 (Optional)
2600
TEMPERATURE
31.0
HUMIDITY
43.3
STATUS
150
9-pin serial
Figure 11.1: Main board
Summary of Contents for Auto Clean UV254
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