Hach QbD1200+, Manual, Page: 22 / 128

Problem Possible cause Solution
The auto sampler does not
operate. The auto sampler is
disconnected or the power is
set to off. Connect the USB cable from
the auto sampler to the
instrument again. Set the
power to on.
The electrical transients on the
power line are too large, which
may disrupt the USB
communication between the
analyzer and the sampler. Install any commercially
available USB opto-isolator
between the analyzer and the
auto sampler. To repair USB
communications, set the power
for both instruments to off, then
to on.
An "Invalid Password" message
shows. The password entered is not
the correct password. Enter the correct password or
select a different user name.
An "Access Denied" message
shows. The user was not given
specified permissions.
• Give the necessary
accessibility permissions to
the user.
• Log in as a different user
who has more permissions.
A new user name cannot be
made. The specified user name was
already made. Make a user account with a
unique username.
The database is corrupt or the
file is not found.
The new password is not
accepted. The password and the confirm
password are not the same. Enter the same password in
both fields.
The user interface error
messages are shown during
menu changes. An error occurred in the user-
interface firmware. Set the instrument power to off,
then to on. Contact technical
support if necessary.
Measurement results report
random errors. The temperature or voltage of
a hardware component is too
high. Contact technical support.
Section 10 Replacement parts and accessories
W A R N I N G
Personal injury hazard. Use of non-approved parts may cause personal injury, damage
to the instrument or equipment malfunction. The replacement parts in this section are
approved by the manufacturer.
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to
the company website for contact information.
Replacement parts
Description Item no.
UV reactor replacement kit 9880200
Syringe replacement kit 9891700
Tubing replacement kit 9898900
22 English