Rocker CR 25 User manual

INSTRUCTION MANUAL
Chemical Oxygen Demand Reactor
Model No.
CR 25
Please read this instruction manual before using this product.
Instruction Video

1
This instrument is designed for laboratory usage only. Please read this manual carefully before
installing and operating. The instrument shall not be modified in any way. Any modification
will void the warranty and may result in potential hazard. We are not responsible for any injury
or damage caused by any non-intended purposes and modifying the instrument without
authorization.
1. Check the voltage specified on the name plate and ensure it matches the line voltage in
your location.
2. Install the instrument in a clean, dust-less and well-ventilated area under 40°C.
3. Please keep the instrument away from inflammables.
4. The surface temperature of the instrument is very high after work or during work, please do
NOT touch it to avoid serious burns.
5. Operating condition
(a) Ambient temperature: 5~ 40 °C
(b) Relative humidity: 80% RH Max.
(c) Power supply: 100~120V, 50/60Hz or 200~240V, 50/60Hz
(d) Fuse: T4A, 250V for 100~120V or T2A, 250V for 200~240V
(e) Altitude: up to 2000 m (f) IP20
(g) Pollution degree: II (h) Overvoltages category: I
esuroodnI)i(
Caution: Hot surface
The equipment must be disconnected from the mains supply before
replacing the fuse link.
Important Notice
!

2
Please check if the package is complete without any damage before unpacking. When
unpacking, please make sure you have all accessories that indicated on the list. If there is any
problem, please keep the serial number along with packing case and contact your local
distributor immediately for assistance.
Item Content
1 CR 25 Main Unit
2 Power Cord
3 Instrument Manual
(1). Main Part
Item Designation Item Designation
1 Power Switch 5 Hole for Mercury Thermometer
2 Power Plug and Fuse Holder 6 Hole for Digital Thermometer Probe
3 Anti-heat PTFE Plate 7 Operation Panel
4 Hole for 16 mm Digestion Vials 8 Protective Lid (Optional)
Unpackin
g
Main Part Dia
g
ram

3
(2). Operation Panel
Position Designation Position Designation
1 Display 4 Setting / Calibration Button
2 Up Button 5 Start / Stop Button
3 Down Button
(1). Buttons
Button Designation Description
▲Up Button Select program or change setting value.
(Hold the button to change value continuously)
▼Down Button Select program or change setting value.
(Hold the button to change value continuously)
Setting /
Calibration Button
1. Program calibration (Temperature).
2. User program setting (temperature and timer)
/ ◼Start / Stop Button 1. Start or stop heating.
2. Stop setting or calibration.
Button / S
y
mbol / Displa
y
Explication

4
(2). Symbols
Symbol Description
T1 / T2
▲ ▼Hold down both and to switch Standard Timing Mode (T1) or
Preheated Timing Mode (T2) during heating state.
Reach the set temperature, ready to start the program.
THeats the block to set temperature.
\|/- Timing state indication
T1 T1. T1: T1Heating state indication, symbols alternate every 0.5 sec
(3). Display
yalpsiDgnitaeHyalpsiDmargorP
Position Designation Position Designation
1 Program Name, Temp, Time 3 Actual Temperature
2 Program Standby Indication 4 Heating State
          
 


      
   

 


5
(1). Program Menu
Item Description Remark
1: COD Heats for 2 hours at 150 °C. Standard Timing Mode (T1)
2: COD2 Heats for 20 mins at 165 °C. Preheated Timing Mode (T2).
3: TP Heats for 30 mins at 150 °C. Standard Timing Mode (T1)
4: TN Heats for 30 mins at 105 °C. Standard Timing Mode (T1)
5: TPN2 Heats for 30 mins at 120 °C. Preheated Timing Mode (T2).
6: TOC Heats for 2 hours at 105 °C. Standard Timing Mode (T1)
7: PRG1 Program temperature and heating
time are editable.
User Program
margorPresU2RSU:8
(2). Program Operation
(a). COD, TP, TN, TOC Predened Programs (Standard Timing Mode, T1)
Step Operation Screen Display
1 Switch on the instrument and LOGO shows
on the screen.
C O D R e a c t o r
2 Program menu shows on the screen in 2
seconds (1).
C O D 1 5 0 ° C 1 2 0 '
OK
3
Select desired heating program by using
「▲」or 「▼」.
(8 programs are selectable.)
C O D 2 1 6 5 ° C 2 0 '
OK
4
Press 「/」to start heating after
confirming temperature and time of
program(2) (3).
C O D 1 5 0 ° C 1 2 0 '
2 6 ° C T 1 
Operation

6
5
T1 Standard Timing Mode (4): one beep
indicates set temperature has been reached
and time will automatically count down to
zero.
C O D 1 5 0 ° C 1 2 0 /
26 ° C
6
The instrument will beep for 15 seconds to
indicate the program is complete and stop
automatically. Press any key to stop the audio
alarm. Press 「/」to return to the
program menu for another new program.
C O D 1 5 0 ° C 0 0 0 '
150°C
Note 2. (a).
(1) The machine will memorize the selected program and maintain when machine is switch
on next time.
(2) How to stop or select other program:
Press 「/」then comes with a “STOP HEATING?” message. Press 「/」to stop
heating and return to program list.
(3) How to calibrate temperature during the heating state:
Hold down 「」during heating state to enter temperature calibration mode for
current program. Please refer to Procedure for Temperature Calibration to calibrate the
temperature.
(4) How to switch Timing Mode:
T1 Standard Timing Mode: Automatically counts down to zero when the instrument
reaches to set temperature. Hold down 「▲」and 「▼」simultaneously to switch to
T2 Preheated Timing Mode during heating state.

7
(b). COD2, TPN Predened Programs (Preheated Timing Mode, T2)
Step Operation Screen Display
1 Switch on the instrument and LOGO shows on
the screen.
C O D R e a c t o r
2 Program menu shows on the screen in 2
seconds (1).
C O D 1 5 0 ° C 1 2 0 '
OK
3
Select desired heating program by using 「▲」
or 「▼」.
(8 programs are selectable.)
C O D 2 1 6 5 ° C 2 0 '
OK
4
Press 「/」to start heating after
confirming temperature and time of
program(2) (3).
C O D 2 1 6 5 ° C 2 0 '
2 6 ° C T 2 
5
T2 Preheated Timing Mode (4): beep two times
and will show up to indicate the set
temperature is reached.
C O D 2 1 6 5 ° C 2 0 '
16 5 ° C 
6 Place the test vials into the heating block, then
press 「/」to start(5).
C O D 2 1 6 5 ° C
165°C
2 0 '
1 6 2 ° C T 
7
After reaching the set temperature or press
「/」, the instrument will beep and
automatically count down to zero.
C O D 2
20 /
16 5 ° C
8
The instrument will beep for 15 seconds to
indicate the program is complete and stop
automatically. Press any key to stop the audio
alarm. Press「/」to return to the program
menu for another new program.
C O D 2 1 6 5 ° C 0 0 0 '
16 5 ° C

8
Note 2. (b).
(1) The machine will memorize the selected program and maintain when machine is switch
on next time.
(2) How to stop or select other program:
Press 「/」then comes with a “STOP HEATING?” message. Press 「/」to stop
heating and return to program list.
(3) How to calibrate temperature during the heating state:
Hold down 「」during heating state to enter temperature calibration mode for
current program. Please refer to Procedure for Temperature Calibration to calibrate the
temperature.
(4) How to switch Timing Mode:
T2 Standard Timing Mode: Reach and Hold the temperature and wait for further
instruction. Hold down 「▲」and 「▼」simultaneously to switch to T1 Standard
Timing Mode during heating state.
(5) The temperature of heating block will slightly decline after inserting vials. The timer will
start after the heating block reach to set temperature. Press 「/」to cancel the
waiting process and start to count down immediately.

9
(c). PRG1, PRG2 User Programs
Step Operation Screen Display
1 Switch on the instrument and LOGO shows on
the screen.
C O D R e a c t o r
2 Program menu shows on the screen in 2
seconds (1).
C O D 1 5 0 ° C 1 2 0 '
OK
3 Select PRG1 or PRG2 program by using 「▲」
or 「▼」.
P R G 1 1 5 0 ° C 1 2 0 '
OK
4
Press 「 」to start parameter setting by using
「▲」and「▼」. Press「/」to complete
the setting process.
Temp: 30~200 °C
Timer: 1~999 min or Continuous Mode (On)
P R G 1 1 0 0 ° C 1 2 0 '
O K
5
Press 「/」to start heating after
confirming temperature and time of
program(2) (3).
P R G 1 1 0 0 ° C 1 2 0 '
2 6 ° C T 1 
6
T1 Standard Timing Mode (4):one beep
indicates set temperature has been reached
and time will automatically count down to
zero.
P R G 1 1 0 0 ° C 1 2 0 /
100°C
7
The instrument will beep for 15 seconds to
indicate the program is complete and stop
automatically. Press any key to stop the audio
alarm. Press「/」to return to the program
menu for another new program.
P R G 1 1 0 0 ° C 0 0 0 '
10 0 ° C

10
Note 2. (c).
(1) The machine will memorize the selected program and maintain when machine is switch
on next time.
(2) How to stop or select other program:
Press 「/」then comes with a “STOP HEATING?” message. Press 「/」to stop
heating and return to program list.
(3) How to calibrate temperature during the heating state:
Hold down 「 」 during heating state to enter temperature calibration mode for
current program. Please refer to Procedure for Temperature Calibration to calibrate the
temperature.
(4) T1 Standard Timing Mode: Automatically counts down to zero when the instrument
reaches to set temperature. Hold down 「▲」and 「▼」simultaneously to switch to
T2 Preheated Timing Mode during heating state.
(5) T2 Standard Timing Mode: Reach and Hold the temperature and wait for further
instruction. Hold down 「▲」and 「▼」simultaneously to switch to T1 Standard
Timing Mode during heating state.

11
(3). Procedure for Temperature Calibration
Insert thermometer into 16 mm vial which filled with nearly 5 mL
glycerol and touches the bottom of vial. Insert the vail on center
of heating block as shown on the right. Calibrate temperature as
following procedure.
Digital or mercury thermometer can be used for calibration, please
make sure thermometer is calibrated regularly or certified by standard
organization to ensure the accuracy.
General lab thermometers are often not accurate enough for
calibration.
Step Operation Display
1
Hold down 「」to enter temperature
calibration mode of current program during
heating state.
C O D 1 5 0 ° C 1 2 0 '
OK
2
The calibration (1)(2) will be proceeded
based on set temperature of current
program and screen shows heating state at
same time.
C A L 1 5 0 ° C 3 0 ° C
He a t i n g T 
3 A 30-min timer for stabilization shows up
after set temperature has been reached.
C A L 1 5 0 ° C 1 5 0 ° C
Wa i t i n g 3 0 \
4
Adjust the actual temperature on
thermometer by pressing「
▲ 」and「▼」.
Then press 「」to finish the calibration
procedure.
C A L : A D J 1 5 0 ° C

12
Note 3.
(1) The calibration parameters of each program are independent and have no impact on
other programs when executing calibration procedure for specific program.
(2) If heating block is hotter than set temperature, you should wait for temperature
declining.
(3) How to stop calibration procedure:
Press 「/」then comes with a “STOP HEATING?” message. Press 「/」to stop
heating and return to program list, or 「 」 to continue calibration.

13
1. Please operate the instrument in well ventilated area.
2. The instrument is not autoclavable. Please clean the surface by pure water or 75% ethanol.
3. If a vial overflows, or liquid is spilled, please switch off the instrument, unplug the power
cord immediately. Clean the instrument as soon as possible while it cools down to prevent
corrosion.
4. Incorrect power source may cause fuse blew. A spare fuse is available in fuse holder and can
be taken out with flathead screwdriver.
Problem Reason and Solution
Fail to start
or
Abnormal
Display
Loose plug Reconnect plug to power supply.
Fuse blew Replace a new fuse.
Instrument is over temperature Cool the instrument down and
operate in well-ventilated circumstance.
Display or components failure Contact distributor for assistance.
Liquid spilled
during
heating process
Incorrect temperature setting Reset heating temperature.
Incorrect temperature of block Calibrate the temperature.
Loose vial cap Change vial and tighten the cap
Incorrect sample volume Change new vial and fill right volume
Improper reagent Change new reagent, world renowned brand
is suggested.
Other problems Please contact distributor for assistance
Maintenance
Troubleshooting

14
179250-11(22) CR 25, COD Reactor, AC110V,60Hz (AC220V,50Hz)
198200-01(02) CD 200, COD Detector, AC100~240V adaptor, US plug (EU plug)
191100-01(02) WD 100, Multiparameter Colorimeter, AC100~240V adaptor, US plug (EU plug)
179250-43 Protective Lid
AWE770110 1000~5000 ul Pipette (Adjustable)
SSI 5000-50 5 ml Pipette Tip (50/PK)
Ordering Information
RO-OPE179250-EN202102-C01

Rocker Scientic Co., Ltd.
Tel: [phone] Fax: [phone]
E-mail:[email protected] https://www.rocker.com.tw