*The tip light is not required for operation, but should be removed by clipping the leads
near their base if the instrument is going to be used without it.
This unit contains no user serviceable parts beyond those listed in this
table. In the event your instrument is physically damaged or does not
function properly after taking the listed action, please return the
instrument to UEi following the warranty and service instructions.
S p e c i f i c a t i o n s
Operating Conditions
To ensure accurate readings from your CD200, use it only when ambi-
ent air is within this range:
Temperature:
32 to 120˚F
Humidity:
10 to 90% RH (non condensing)
Replacing the Batteries
Replace your 1.5 volt AA alkaline batteries when:
• The green
READY
light begins to strobe (flash on and off)
• No light or other activity occurs upon turning the instrument on
To replace the batteries:
1. Lay the instrument face-down on a clean, flat surface.
2. Remove the battery cover. Apply upward pressure to the tab at
the bottom of the battery cover while lifting it out.
3. Remove the batteries using a coin or screwdriver, if necessary,
to pry them out.
4. Replace all four batteries with new ones.
Replacing the Sensor
Although the sensor is designed to offer many years of reliable service,
it may become inoperable if it is submerged in liquid or otherwise
physically damaged.
To replace sensor:
1. Turn the instrument off
2. Remove the upper tip guard by pressing and lifting straight up
from the alignment notch that separates the two halves of
the tip guard.
3. Move the tip-light out of the way. This is a sturdy component,
but use caution bending its leads.
4. Pull the sensor straight up from its tip housing.
5. Relace the sensor, pressing it straight in.
6. Reassemble in reverse order.
Calibration
The pre-set alarm threshold can be calibrated to any setting from 0 to
40% of LEL (methane in air) by the UEi service center, or by other
facilities having calibration gas standards.
To ensure your instrument is performing at its peak, send it to the
UEi service center or a qualified instrument calibration facility for
annual calibrations.
CD200-MAN
P. 3
Instrument does not turn on
Instrument does not tic after it
is switched on, but lights work
Appropriate indicators
do not light
The tic rate does not increase
when the sensor is exposed to
combustible gas
Tic rate remains fast after
warm up
Alarm does not stop sounding
when instrument is used in
fresh air
The green REA DY light strobes
or flashes
Tip light does not shine
If I See This Malfunction I Should Check Corre c t i ve Action
B a t t e ry voltage
Mode switch position
Tic rate adjustment
Earphone jack
B a t t e ry voltage
Tic rate adjustment
A i r f l ow to sensor
Sensor connection
Sensor contamination
Sensor contamination
Constant fast tic and
visual indica t o r s
Proper alarm
s e n s i t i v i ty setting
B a t t e ry voltage
P h y s i cal damage
Replace low batteries
Place firmly in ON or ALM position
Increase tic rate by turning knob
c l o c k w i s e
Remove earphone plug or debris
inserted in receptacle
Replace low batteries
Increase tic rate by turning knob
c l o c k w i s e
Clear restriction
Lit sensor out and replaced firmly
Replace sensor
Replace sensor
Replace sensor
Adjust sensitivity clockwise
Replace low batteries
*Return for repair
S i z e
8 3/4” x 3 1/4” x 2 1/ 2 ”
(Add 1” to height and width to account for coiled probe)
Probe lengt h
18” (46 cm)
Weight: Batteries installed
16.0 oz. (450 g )
Power requirements
Four AA alkaline batteries
A v e rage battery life
Approximately 12 hours (continuous use)
S e n s i t i v i ty
< 50 PPM methane in air
S e n s o r
Solid state conductivity (semiconductor)
D u ty cy c l e
C o n t i n u o u s
Ty p i cal response time
Less than 2 seconds for maximum response with 40% LEL
methane in air stimulus
Ty p i cal recovery time
Less than 4 seconds recovering from 40% LEL methane in air
Warm up period
One minute avera g e
A l a r m
Adjustable from 10 to 40% LEL - methane in air (Can be
ca l i b rated for other gasses)
Visual level indica t o r s
Six tic rate scaled LED indicators, changing with gas
c o n c e n t ration levels from green to red (including
relative, not specific quantities)
Sensor
