Nova-Tech DO 700 User Manual
Instruction Manual
gyM
sy...
sales@novatech-usa.com
www.novatech-usa.com
Tel: (866) 433-6682 Fax: (866) 433-6684
Tel: (281) 359-8538 Fax: (281) 359-0084
DO 700 Dissolved Oxygen/ºC/ºF
Part of Thermo Fisher Scientific 68X541703 Rev. 1 Feb. 2010
Bench Meter
Tech nol o
adeEa
TABLE OF CONTENTS
1. INTRODUCTION.............................................................. 1
2. GETTING STARTED........................................................ 2
2.1 Keypad Functions ...................................................................2
2.2 LCD Annunciators...................................................................3
2.3 Meter Connections..................................................................3
3. DISSOLVED OXYGEN / ATC ELECTRODE................... 4
4. CALIBRATION................................................................. 5
4.1 Temperature Calibration .........................................................6
4.2 % Saturation Calibration .........................................................7
4.3 100% Calibration.....................................................................7
4.4 0% Calibration.........................................................................7
4.5 mg/L or ppm (Concentration) Calibration................................8
5. SETUP FUNCTIONS........................................................ 10
5.1 1.0 CAL (Calibration)...............................................................10
5.2 2.0 ELE (Electrode Information)..............................................10
5.3 3.0 ConF (Configuration).........................................................11
5.4 3.1 rdY (Ready Stability Indicator / Auto Hold)........................11
5.5 3.2 ºC ºF (Celsius or Fahrenheit)............................................11
5.6 3.3 dPr (Barometric Pressure Adjustment)..............................11
5.7 3.4 SALt (Salinity Adjustment) ................................................12
5.8 3.5 OFS (Offset Adjustment) from % mode.............................12
5.9 3.5 Unit (Unit Adjustment) from concentration mode...............12
5.10 4.0 rSt (Reset).........................................................................13
5.11 5.0 CLr (Clear Stored Memory)...............................................13
6. TAKING MEASUREMENTS............................................ 14
6.1 HOLD Function .......................................................................15
6.2 Storing and Recalling Data .....................................................15
7. ELECTRODE MAINTENANCE........................................ 16
8. DISSOLVED OXYGEN THEORY .................................... 19
REPLACEMENTS AND ACCESSORIES........................ 23
9.
10. TROUBLESHOOTING GUIDE......................................... 24
11. SPECIFICATIONS............................................................ 26
12. WARRANTY..................................................................... 27
13. RETURN OF ITEMS......................................................... 28
1. INTRODUCTION
Thank you for purchasing our DO 700 series benchtop meter.
This microprocessor-based meter is economical and simple to
use. The design incorporates a large LCD for clear viewing, yet
offers a small footprint to conserve space.
The DO 700 measures Dissolved Oxygen in % saturation or
concentration (mg/L or ppm) with temperature (ºC or ºF).
Each meter includes a convenient slide-out card for quick
reference. Also included is an electrode arm and metal bracket
which can be easily attached to the left or right side of the meter
according to your preference.
We take great pride in every instrument we manufacture
and hope this one serves you well.
1
2. GETTING STARTED
2.1 Keypad Functions
Powers the meter on and off. Upon power on, the meter
automatically begins in the mode that was last used.
Calibration and memory values are retained even if meter
is unplugged.
Toggle between available measurement modes—%
saturation or concentration (mg/L or ppm). Also used to
switch to Temperature calibration during DO calibration
modes.
Press and hold for 5 seconds to enter SETUP mode.
Toggles between measurement and calibration modes.
In SETUP mode, returns user to the measurement mode.
Confirms calibration values in CAL mode.
Confirms selections in SETUP mode.
View recalled values in memory mode.
Increase value. Scroll up in SETUP & CAL modes.
MI (Memory Insert) stores values into memory.
MR (Memory Recall) recalls values from memory.
Decrease value. Scroll down in SETUP & CAL modes.
Freezes measured reading. Press again to resume
live reading.
2
2.2 LCD Annunciators
2.3 Meter Connections
DC
ATC
DO
Power supply
Temperature connection of Dissolved Oxygen electrode
BNC connection of Dissolved Oxygen electrode
3
3. DISSOLVED OXYGEN / ATC ELECTRODE
The DO 700 includes a galvanic DO
electrode with built in temperature
measurement.
The electrode has a dual cable; a BNC
connector for DO measurement and a miniphono plug for temperature. The electrode is
pre-filled with electrolyte that is separated
from the sample by an oxygen permeable
membrane. The membrane is pre-assembled
for you and fixed to a detachable cap. The
pre-assembled cap design allows simple
replacement and fast conditioning.
The electrode is light-weight with a 12-mm
body diameter and a 16-mm tip diameter
from at the detachable Noryl cap. The
compact sensing area reduces air
entrapment resulting in quick, accurate, and
stable readings.
Provide simple stirring for best results—
ideally achieve a minimum water flow rate of
2 inch/second on the membrane.
The probe is not recommended for samples
beyond 0 to 50 °C.
The membrane is thin and can be replaced if damaged. Use care to
protect from scratches, abrasion, or contact with solids. For best
results keep membrane clean by rinsing after daily use. See Section 7
– Electrode Maintenance.
4
4. CALIBRATION
The DO 700 has three measurement modes; DO as % saturation, DO
as mg/L (or ppm) concentration, and temperature.
Dissolved oxygen levels vary with temperature, barometric pressure,
and salinity, so calibration must be performed with consideration of
these factors. It is necessary to set the proper temperature,
barometric pressure and salinity values prior to performing any
DO calibration or measurement.
See Section 4.1 — Temperature Calibration
See Section 5.6 — Barometric Pressure Adjustment.
See Section 5.7 — Salinity Adjustment.
The DO 700 will accept two % saturation calibration points; 100%
using saturated air or air-saturated water, and 0% using zero oxygen
solution. When 100% or 0% calibration is performed, the concentration
value is adjusted accordingly. Therefore, it is not necessary to calibrate
the concentration mode. If calibrating for 0% oxygen, note that the
meter will take several minutes to reach 0% saturation value and
constant stirring is not required.
The following table lists calibration values in % saturation calibration
mode with two different barometric pressures. Note that the saturation
value (92.1%) has decreased due to the lower barometric pressure
entered.
.
% Saturation
(of factory default value)
less than 10% 0% 0%
10.1% to 49.9% CAL ERR CAL ERR
50% to 150% 100% 92.1%
Calibration Value
(760mmHg)
Calibration Value
(700mmHg)
If calibration is attempted from 10.1% to 49.9%, CAL Err message is
shown—calibration is rejected and the display will return to calibration
mode.
5
Loading...