4
O&M Manual
Rev-L (7/15)
Part 1 - Introduction
1.1
General
The Model Q45D/60 is a highly versatile portable monitoring/recording system designed
for the measurement of dissolved oxygen in solution. The full scale operating range of
the system is 0-40.0 ppm and the sensing system will operate on water streams with
temperatures from 0 to 50
C.
The system operates on two AA batteries, and will run continuously for approximately
240 hours.
Warning: If unit is to be stored for more that 6 months REMOVE the
batteries from the holder to avoid potential damage from battery
leakage
The basic sensing element used in the dissolved oxygen monitor is a galvanic membrane
sensor which measures dissolved oxygen directly.
1.2
Features
Standard Q45P electronic transmitters are designed to be a fully isolated, battery
powered instrument. The monitor can be quickly converted to either a loop power
transmitter or line powered analyzer.
Two 10-bit, isolated, 0-2.5 VDC analog outputs may be configured to track pH and
temperature, or pH and pH. Both analog outputs can be individually programmed to
specific ranges.
Large, high contrast, custom Super-Twist display provides excellent readability The
secondary line of display utilizes 5x7 dot matrix characters for clear message display.
Two of four measured parameters may be on the display simultaneously. An LED back
light can be turned on if necessary for use in very low light conditions
.
Sensor diagnostics monitor glass breakage, sensor leaks, and RTD condition.
Diagnostic messages provide a clear description of any problem with no confusing error
codes to look up. Messages are also included for diagnosing calibration problems.
Quick and easy two-point and sample calibration methods include auto-buffer recognition
from 3 built-in buffer tables. To provide high accuracy, all calibration methods include
stability monitors that check temperature and main parameter stability before accepting
data.
Selectable Pt1000 or Pt100 temperature inputs. Systems can also be hard-configured for
three-wire elements. Temperature element can be user calibrated.
Security lock feature to prevent unauthorized tampering with transmitter settings. All
settings can be viewed while locked, but they cannot be changed.
